I just purchased a new angus bull and he is young, 14 mths. The person I bought him from fed him 20 lbs of grain a day. Should I continue this amt of feed since I also have good grass? Is it better to feed him twice a day or just leave feed out all day and let him take it as he wants it? I plan on keeping him on 2 acres of fertized bermuda at the house. I don't want to harm his development and growth.